package com.msh.platform.elm.common.util;

import java.security.MessageDigest;

public class MD5 {

	private static final String hexDigits[] = {
		"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", 
		"a", "b", "c", "d", "e", "f"
	};

	public MD5() {
	}

	public static String byteArrayToHexString(byte b[]) {
		StringBuffer resultSb = new StringBuffer();
		for (int i = 0; i < b.length; i++) {
			resultSb.append(byteToHexString(b[i]));
		}

		return resultSb.toString();
	}

	private static String byteToHexString(byte b) {
		int n = b;
		if (n < 0) {
			n += 256;
		}
		int d1 = n / 16;
		int d2 = n % 16;
		return (new StringBuilder(String.valueOf(hexDigits[d1]))).append(hexDigits[d2]).toString();
	}

	public static String compile(String origin) {
		String resultString = null;
		try {
			resultString = new String(origin);
			MessageDigest md = MessageDigest.getInstance("MD5");
			resultString = byteArrayToHexString(md.digest(resultString.getBytes()));
		}
		catch (Exception exception) { }
		return resultString;
	}

}